| abstract |
The invention provides compounds of formula (I): ##STR1## or a physiologically acceptable salt, solvate or metabolically labile ester thereof wherein n Ar represents the group ##STR2## wherein R 3 represents an acidic group selected from --CO 2 H, --NHSO 2 CF 3 or a C-linked tetrazolyl group; n Het represents the group ##STR3## with all other undefined groups being defined in the specification. The compounds may be used in the treatment or prophylaxis of hypertension and diseases associated with cognitive disorders. |